frequency
number of phases
phase rotation
All of the above
第1题：
A.higher than the bus equency
B.lower than the bus equency
C.the same as the bus frequency but out of phase with it
D.same as the bus frequency and the circuit breaker may be closed at
第2题：
Equal power factors on paralleled AC generators are maintained by an automatic ________.
A.governor control switch
B.reverse power relay
C.reverse current relay
D.voltage regulator
第3题：
Spring tides occur______．
A.when the moon is new or full
B.when the moon and sun have declination of the same name
C.only when the moon and sun are on the same sides of the earth
D.at the beginning of spring when the sun is over the equator
第4题：
to be kept
logged
changed
has remained
第5题：
When installing processors with mixed stepping levels in a server， which of the following guidelines must be followed？ （）
第6题：
When the prime movers of two paralleled generators are equipped with mechanical-hydraulic governors, and are operating within their designed range, the unit with the least amount of speed droop will .
A.pick up more of any increase in load
B.pick up less of any increase in load
C.share an equal amount of any increase in load
D.drop an equal amount of any decrease in load
第7题：
While paralleling two AC generators using synchronizing lamps only, both lamps will go dark when the generators are______.
A.running at the same speed
B.grounded
C.of the same polarity
D.in phase
第8题：
Erna Hart _______ a good swimmer; she swam across the English Channel when she was only fourteen years old!
A、must be
B、must have been
C、could be
D、should have been
第9题：
When using the Call Subflow step, can variables be shared between the parent (calling) flow and the subflow?（）
第10题：
Both source and target database must be the same character set
Both source and target database must have the same endian format
The COMPATIBLE parameter must be the same in the source and target databases.
The minimum compatibility level for both the source and target database must be 10.0.0.
All read-only and offline data files that belong to the tablespace to be transported must be platform aware.